Means for cooling molds



June 21 1927. 1,633,028

R. LA FRANCE MEANS on COOLING MOLDS Filed June 12. 1922 2 Sheets-Sheet 1 Fig.1

INVENTOR 41 W 1,633,028 June 21 2 R, LA FRANCE MEANS FOR COOLING MOLDS Filed June 12. 1922 2 Sheets-Sheet 2 Fig.5.

' INVENTOR fl Q Patented 21, 1927.

UNITED STATES PATENT OFFICE.

BIQHABID LA FRANCE, 01' TOLEDO, OHIO, ASSIGNOB TO TEL OWENS BOTTLE OI TOLEDO, OHIO, A CORPORATION OF OHIO.

comm,

mus FOR COOLING HOLDS.

My invention relates particularly cooling means for use in connection with the molds of glass forming machines. In the formation of hollow glassware such as bottles, jars and the like, the molten or plastic glass is introduced at a high temperature into comparatively cold molds. The heat from the glass is rapidly absorbed bythe molds and as the latter must be kept comparatively cool to prevent the glass from sticking and also to effect the necessary Chllling or cooling of the glass, some means for cooling the molds is often employed.

In practice, it is customary to cool the molds by blowing air thereon, but this method as ordinarily practiced does not alwa s cool the molds as quickly as desirable, an the output of the machine is curtailed owing to the comparatively slow speed necessary to prevent excessive heating of the molds.

An object of my invention is to provide a novel and efiicient means for rapidly cooling the molds, thereby increasing the output of the machine by permitting it to be operated at a comparatively high speed. The invention is also particular y adapted for use 1n cooling plural molds,that is, molds each having a plurality of glass-shaping cavitles. The cooling of such molds has been found specially dilficult, and the present invention is particularly adapted to meet thisdifliculty.

Other objects of the invention will appear hereinafter.

In the accompanying drawings:

Figure 1 is a fragmentary view of an Owens type of machine with the present invention applied thereto. For a full disclosure of the machine itself, reference may be had, for example, to Patent No. 1,185,687, granted in my name June 6, 1916.

Figure 2 is a plan view taken at the line 2 on Figure 1, showing a mold and the cooling arms.

Fi re 3 is a sectional elevation at the plane of the line 33 on Figure 2.

Figure 4 is a plan view of the mold bottom.

Figure 5 is a section at the line 5-5 on Fi re 4.

i re 6 is a plan view at the plane indicatefl iy the line 66 on Figure 3.

The glass blowing machine comprises a rotating mold carriage 10 on which are mounted on s of molds each including a blank mo d, (hot shown), a' neck mold 11 being substantia 1 Application filed m. 12, 1022. Serial Io. 507,510.

and a finishing mold M. After a charge of glass has been formed in the blank mold, the

latter is opened leaving the glass blank sus.

pended from the neck mold. The finishin mold M is then closed around the blank and air under pressure supplied through a blowmg head 12 to blow the blank or blanks to finished form. v The mold M com rises sections mounted for movement to an from each other about a pivot 13. The mold sections are actuated by lever arms 14 connected through links 15 to the mold sections. As shown, the mold 1s provided'with a plurality of cavities or openings 16, permitting a number of articles to be formed simultaneously in 1 the mold. The mold comprises a solid body portion 17 on which are formed cooling ribs 18. These ribs which are spaced at short intervals are L substantially circular in outline,that is to say, the peripheries of the ribs form substantially the circumferences of circles. The outline of the solid body portion 17 of the mold is curved as indicated by the dotted lines 19 (Fig. 2;, the curves of this outline 1y concentric with the mold cavities 16, so that the thickness of the mold wall as measured between any point on its periphery and the nearest mold cavity, is substantially uniform.

It will be, observed that the diameter or width of the mold body at the section line 3 -3, Fig. 2, (intermediate the mold cavities) is less than the width of the mold body as measured b a line parallel to the line 33 and passlng through the center of a mold cavity 16. In other words, the body of the mold at the base of the ribs is reduced in diameter at the portions intermediate the mold cavities.

The arms 14 are made hollow and cooling air is supplied therethrough. These arms are formed with face plates 20 concentric with the axis of the mold. Said plates are formed with vertically disposed slots or nozzles 22 through which the air is blown directly against and between the cooling ribs 18. Heretofore, great diificulty has been experienced in cooling plural cavity molds, owing to the large mass of iron in the molds and the comparativel short time permitted for cooling. It will e noted that with the present construction, the mass of iron and thickness of the mold walls are greatly reduced as compared with a mold of circular form. Also,hthe coolin ribs are offtge test de t o posite e portions 0 t e l d betw an tliia two mold cavities, thus resent the largest cooling area op 'tethe hotyt portions of the mold, that i l he rtionsto which heat is transmitted rom b th mold cavities. The arrangement here shown has been found to be ve "eflective in keeping the molds at the desir temperature A mold bottom B forms a closure for the lower end of the mold cavity. This bottom, as shown, is substantially circular in outline. The mold sections are provided with depending flanges or extensions 23 which when the mold is closed surround the bottom B. The mold bottom is formed with an annular depending flange 24 proyidin an open s ace 25 in the lower port1on o the mold ttom. .Two ribs 26 extending diametrically across the mold divide said chamber into four compartments or uadrants. Projectin inwardly from the ange 24 are radially isposed ribs 27 which, as shown in Fi ure 4, terminate a short distance from t e ribs 26.

Formed on the under side of the mold bottom is a cylindrical extension 28 whichfits in a correspondingly shaped opening in a supporting block 29. Air passages 30 ea d through this block for conducting an through the cylinder 28 into the space 25 for coolin the mold bottom. The air thus admittef at the lower central portion of the mold bottom passes outward along the cooling ribs 27 and 26 and escapes throu h the passageway provided between the mo (1 bottom and t e block 29. The ribs 26 and 27 provide a large cooling area in contact with the rapidly moving a1r so that the heat is rapidly conducted from the mold bottom.

The cooling air may be supplied from any suitable source and is preferably conducted from the central lportion of the machine outward to the mo ds, as is common in this tyg; of machine.

. odifications may be resorted to within the spirit and scope of my invention.

What I 'claim is:

1; A mold formed with a plurality of molding cavities and cooli ribs on the mold, the outline of the mol with the ribs thereon being substantially circular, and the body of the mold at the base of the ribs being reduced in diameter at the portions intermediate said mold cavities, I

- bination 0 as mold formed with' aplurality. of mold cavities and havinglaterally projecting cooling ribs, said be being of eatestdepth at points interm diate the mo d cavities.

3. The combination of a mold, a mold bottom therefor, said bottom having a downwardly directed peri heral extension -or flange, and ribs exten radially inward from said flan 4. The combination of a mold, a mold bottom therefor, said bottom having a downs wardly directed flange, ribs within said flange air u war peripheral extension or the space surrounded by and means for directing cooling inst said ribs.

he com ination of, a mold, a mold bottom therefor, said bottom having a downwardly directed ,peri flange, and ribs exten ing radially inward from said flan said bottom having formed thereon an a ditional cylindrical extension of reduced diameter projecting downward from said ribs.

6. The combination of a mold, a mold bottom therefor, said bottom having a downwardly directed ripheral extension or bars] extension or flange, ribs extending radially inward from sald .flange, said bottom having formed thereon an additional cylindrical extension of reduced diameter projecting downward from said ribs, and a supportin member provided with an opening in whic said cylindrical extension is seated said support formed with air passages through which cooling air is directed upward'through said means for directing cooling air against the body of the mold and against said mold bottom.

Signed at Toledo, in the county of Lucas and State of Ohio, this 8th day of June, 1922.

RICHARD LA FRANCE. 

